/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/ShapeApproximation/MeshSimpleShapeApproximation.h
the capsule is fit by first fitting a line to the vertices, and then containing the points, so the fit can deviate quite a bit from a truly "minimal" capsule
void Generate_Capsules ( [FSimpleShapeSet3d](API\Plugins\DynamicMesh\ShapeApproximation\FSimpleShapeSet3d) & ShapeSetOut )